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AD9218–SPECIFICATIONS

SWITCHING SPECIFICATIONS

Test

AD9218BST-40/-65

AD9218BST-80/-105

Parameter

Temp

Level

Min

Typ

Max

Min

Typ

Max

Unit

ENCODE INPUT PARAMETERS

Maximum Encode Rate

Full

40/65

80/105

MSPS

Minimum Encode Rate

Full

20/20

MSPS

Encode Pulsewidth High (tEH)

Full

7/6

5/3.8

Encode Pulsewidth Low (tEL)

Full

7/6

5/3.8

Aperture Delay (tA)25

°CV

Aperture Uncertainty (Jitter)

°C

ps rms

DIGITAL OUTPUT PARAMETERS

Output Valid Time (tV)*

Full

Output Propagation Delay (tPD)*

Full

4.5

Output Rise Time (tR)25

°C

1.0

Output Fall Time (tF)25

°C

1.2

Out of Range Recovery Time

°CV

Transient Response Time

°CV

Recovery Time from Power-Down

°C

Cycles

Pipeline Delay

Full

Cycles

NOTES

*tV and tPD are measured from the 1.5 level of the ENCODE input to the 50%/50% levels of the digital outputs swing. The digital output load during test is not to

exceed an ac load of 5 pF or a dc current of

±40 µA. Rise and fall times measured from 10% to 90%.

Specifications subject to change without notice.

SAMPLE N

AINA,

AINB

ENCODE

A&B

D9A–D0A

D9B–D0B

DATA N–5

SAMPLE

N+1

tPD

SAMPLE

N+2

SAMPLE

N+3

SAMPLE

N+4

SAMPLE

N+5

SAMPLE

N+6

DATA N–4

DATA N–3

DATA N–2

DATA N–1

DATA N

DATA N–5

DATA N–4

DATA N–3

DATA N–2

DATA N–1

DATA N

1/fS

tEL

tEH

Figure 1. Normal Operation, Same Clock (S1 = 1, S2 = 0) Channel Timing

(VDD = 3.0 V, VD = 3.0 V; external reference, unless otherwise noted.)

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